This climate cording and the climatic zonations moving force the global environment to change a lot.
这种气候的变冷，世界气候带的移动，使当时全球环境发生了巨大变化。
2
The county was divided into four zonations, as "north stable region", "east rough stable region", "north west unstable region" and "south west highly unstable region".
According to the need for different zonations, different zoning scales are selected. This new method has better adaptability and its zonation result is also quite effective.